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int e^x((x^2+1))/((x+1)^2)dx is equal to...

`int e^x((x^2+1))/((x+1)^2)dx` is equal to
(a) `((x-1)/(x+1))e^x+c`
(b) `e^x((x+1)/(x-1))+c`
`e^x(x+1)(x-1)+c`
(d) none of these

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